The coffee counter charges $11 per pound for Kenyan French Roast coffee and $10 per pound for Sumatran coffee.

How much of each type chills be used to make 20 pound blend that sells for $10.35 per pound?

x=7

y=13

Step-by-step explanation:

Let kenyan fresh roast=x

And Sumatran coffee=y

x pound + y pound=20 pounds

x=20-y

Cost

x cost $11

y cost $10

11x+10y=10.35*20

Substitute x=20-y into the equation

We have,

11 (20-y) + 10y=207

220-11y+10y=207

-y=207-220

-y=-13

y=13

Recall

x=20-y

Substitute y=13 into it

x=20-13

x=7